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Video embedded · A quick video showing the ease of replacing the battery in the Jabra Sport bluetooth headphones. Jabra says when it it out of warranty they cannot be ...

Jabra BT-350 Disassembly and Repair - Instructables
www.instructables.com/id/Jabra-BT-350-Disassembly-and-Repair
Intro: Jabra BT-350 Disassembly and Repair. I wooted a few of these dandy devices a while back and they work great but the volume buttons are weak and the solder ...

Could be. No battery has a lifetime forever. But perhaps you did not unplug it correct?
Try plugging it in and look if any light goes on when plugged in on the charger. You don't need it on the charger for a long time. Then unplug it an try to start it again. also check if all contacts on the Jabra and on the charge cable are clean and nothing can block the current.

hold all three buttons together ie power and volume ,three color lights will blink, this resets the jabra headset, then try pairing again , when pairing the lights should not slow blink. it should stay constant or random flashing.

From the sounds of this.. It's all due to bad keying of the polarized charging plug. The solid red light PROBABLY means you're battery is pretty darn dead. It'll need a new battery(not worth the cost imho. get a new jabra, and be happy once again) At a certain low voltage, the red light starts blinking. when it drops below the preset threshold, it will shut off completely. If it sits too long at this discharged rate, the battry WILL self-terminate. If the voltage drops below a certain level, it's ruined. Also note, most Li-ion cells will only last a few years. 2-3 years of "full power" is usual. Mine's 2 years old(steady usage), and showing signs of it's age.

"My red light won't go off even though I charged it all night.Also, a small piece of plastic came off the charge opening. I don't know if this is will pose a problem to the use of the Jabra BT150."

This is probably the most telling bit of information. It means you DID plug the charger in upside down. It will NEVER charge in that configuration, as it is supplying power to the completely wrong pins. If the battery was good to start with, it shouldn't hurt the headset, but never know. I have accidentily plugged it in backwards for a couple min before noticing, with no ill efect, but YMMV.